Compute: 11!-10! 9! - Vidyadip

Question

Compute:
$\frac{11!-10!}{9!}$

✓

Answer

We have,

$\frac{11!-10!}{9!}=\frac{11\times10\times9!-10\times9!}{9!}$

$=\frac{9!\times10[11-1]}{9!}$

$= 10\times10$

$=100$

Hence,$ \ \frac{11!-10!}{9!}=100$

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